1327 results about "Aromatic hydrocarbon" patented technology

The invention provides a surface treatment method of a lithium metal pole piece. The invention relates to a surface treatment method of a lithium metal pole piece, which comprises the following steps: reacting the lithium metal pole piece in an organic solvent solution of an aromatic hydrocarbon complexing agent in an inert atmosphere, then taking out the lithium metal pole piece, and cleaning; placing the cleaned lithium metal pole piece in reactive gas for reaction to obtain a modified lithium metal pole piece; wherein the aromatic hydrocarbon complexing agent is a complexing agent which can be subjected to a complexing reaction with lithium, and the reactive gas comprises an oxidizing gas. The original inorganic layer with rough surface appearance and non-uniform component distribution of the lithium metal pole piece is changed into the flat lithium-containing inorganic layer, so that the impedance is reduced, and the service life of the battery is prolonged.

The application discloses a thickened oil viscosity reducer for a main viscosity contribution component of colloid and a preparation method thereof. The thickened oil viscosity reducer comprises the following components in percentage by weight: diethylene glycol methyl ether 25-35%, propylene glycol formate 15-25%, dispersant 5-8%, chelating agent 2-4%, anti-coking agent 0.5-1%, anti-swelling agent 1-2% and corrosion inhibitor 1-2%; and the balance is water. The application is a polar + non-aromatic hydrocarbon solvent system; completely avoids high-risk substances such as nonylphenol polyoxyethylene ether, petroleum sulfonate sodium and organic chlorine; is designed in pertinence and can effectively inhibit metal-induced asphaltene bridging; can withstand working conditions from normal temperature to 250 DEG C and up to 300 DEG C; thermal stability is significantly enhanced, and residual carbon after aging is lower than 8%; viscosity reduction efficiency is higher; the system is more stable, flexible in compounding and suitable for field construction.

The invention belongs to the technical field of organic waste gas adsorption treatment, and particularly relates to enhanced activated carbon for organic waste gas and a preparation method thereof. The invention discloses a modified coconut shell activated carbon adsorbent, which is prepared from the following raw material components: coconut shell activated carbon, Mn (NO3) 2.4 H2O, Ce (NO3) 3.6 H2O, 3-glycidoxypropyltrimethoxysilane, organic affinity silane and a water repellent agent. According to the method, a Mn-Ce mixed oxide core is generated in situ in an inner hole through equivalent-volume impregnation and staged heat treatment, and is used for digesting oxygen-containing organic matters, adsorbing intermediates and keeping the hole channel clean; forming a silica anchoring layer on the surface of the activated carbon by using GPTMS, and carrying out co-condensation on the silica anchoring layer and organic affinity silane to obtain an organic affinity interface matched with aromatic hydrocarbon and non-polar VOC (Volatile Organic Compounds) without blocking holes; an ultra-thin hydrophobic layer is formed at the tail end through polycondensation of low-dosage hydrophobic silane, moisture permeation is reduced, and meanwhile, an organic small molecule diffusion channel is reserved; and the pore structure is effectively protected by adopting a water / alcohol system and low-temperature curing in the whole process.

A method for producing an aromatic heterocycle-substituted difluoroacetic acid derivative having a partial structure represented by the formula (III), by reacting an N-oxido aromatic heterocyclic compound having a partial structure represented by the formula (I) with tetrafluoroethylene in the presence of a compound represented by the formula (II): R—YH, in a solvent selected from an aromatic hydrocarbon solvent, an ester solvent and an ether solvent:

The invention belongs to the technical field of biomass energy utilization, and particularly relates to a method for improving the selectivity of light aromatic hydrocarbon in a biomass product through catalytic pyrolysis of a zeolite molecular sieve catalyst. The content of medium-strong acid sites in the zeolite molecular sieve catalyst is found to have relatively strong positive correlation with the selectivity of light aromatic hydrocarbons prepared during catalytic pyrolysis of biomass, so that when the zeolite molecular sieve catalyst is used for catalytic pyrolysis of biomass, the content of the medium-strong acid sites in the zeolite molecular sieve catalyst can be increased by increasing the proportion of the medium-strong acid sites in the zeolite molecular sieve catalyst; the selectivity of light aromatic hydrocarbon in the catalytic pyrolysis product is improved.

The invention discloses an intelligent catalytic thermal cracking reaction system and method for complex mixed waste plastics, and belongs to the technical field of waste plastic resourceful treatment. The system comprises a feeding device, a high-pressure multi-section cracking reaction kettle, a spraying type heat exchange temperature control system, a heating system, a sensing and analyzing unit, an intelligent control system and a product condensation separation and utilization unit, the method specifically comprises the following steps: (1) pretreating and feeding raw materials; (2) multi-section temperature control cracking reaction; (3) intelligent feedback control; (4) the catalyst has a synergistic effect; and (5) product separation and recovery. According to the invention, a unique spraying type high-pressure multi-section temperature control system is combined with intelligent control of a rate matching algorithm, so that efficient, directional and stable cracking of complex mixed waste plastics is realized, the yield of high-value products such as light olefins, aromatic hydrocarbons and the like is remarkably improved, byproduct residues and energy consumption are reduced, and long-term continuous operation is realized.

The utility model relates to a liquid hydrogen storage system which comprises an integrated hydrogen storage device and a hydrogen storage medium, the integrated hydrogen storage device comprises a liquid storage tank for storing a hydrogen storage medium, a gas storage tank for storing hydrogen, a reactor connected with the output ends of the liquid storage tank and the gas storage tank, a condenser connected with the reactor, a gas-liquid separator connected with the output end of the condenser, a gas compressor and a gas buffer tank, and one or more unsaturated aromatic hydrocarbons or heterocyclic unsaturated compounds with a saturated vapor pressure of more than 1 kPa and a temperature of 20 DEG C. The gas-phase storage medium of the liquid hydrogen storage system sequentially passes through the condenser, the gas-liquid separator, the gas compressor and the gas buffer tank, so that a hydrogen pressurizing, cooling and refluxing process is realized, a liquid hydrogen storage material can be effectively recycled, and the purity of hydrogen can be ensured.

The invention provides an optimization method and system for a biomass catalytic pyrolysis process, belongs to the crossing field of chemical engineering and artificial intelligence, and aims to solve the problem of collaborative optimization of the yield of multiple competitive aromatic hydrocarbon products. The method comprises the following steps: acquiring a data set containing input parameters and corresponding to multiple target aromatic hydrocarbon yields; training a machine learning prediction model based on the data set; integrating the model with a multi-objective optimization algorithm; the model is called through an algorithm to conduct iterative optimization, a Pareto optimal solution set is obtained with the aim of optimizing the yield of multiple aromatic hydrocarbons at the same time, and the solution set comprises multiple sets of optimized input parameter combinations. According to the method, efficient global optimization can be realized, multi-scheme decision support is provided, and the research and development cost is reduced.

The invention provides a continuous process for preparing aromatic hydrocarbon by supercritical carbon dioxide hydrogenation, which comprises the following steps: 1) adding a reaction liquid containing a solvent and a catalyst into a reaction kettle, spraying supercritical carbon dioxide and hydrogen into a reactor by adopting a Venturi ejector, and contacting with the catalyst in the reaction kettle to react; (2) after the reaction in the step (1), the gas in the reactor is sequentially subjected to primary condensation and secondary condensation to respectively condense the solvent and the water, the solvent of the primary condensation returns to the reaction kettle, the water of the secondary condensation is discharged, and the gas after the secondary condensation sequentially passes through an absorption tower and a desorption tower to capture non-aromatic hydrocarbon, the residual gas is used as recycle gas and returns to the Venturi ejector to enter the reaction kettle; and (3) pressurizing the reaction liquid discharged from the reaction kettle after the reaction in the step (1) through a circulating pump, feeding the reaction liquid into a heat exchanger to remove reaction heat, dividing the reaction liquid subjected to heat exchange into two streams through a cross-flow filter, feeding one stream of penetrating fluid into a rectification device, and feeding the other stream of concentrated liquid back to the reaction kettle for continuous reaction.

The invention provides an efficient technological method and system for preparing aromatic hydrocarbon through CO2 hydrogenation. The process method comprises the following steps: 1) mixing feed gas containing CO2 and H2 with recycle gas to obtain a mixture flow, and carrying out first-stage reaction on the mixture flow after heat exchange heating to obtain a first-stage reaction product; 2) performing heat exchange and separation on the primary reaction product to obtain a water phase, a gas phase and an oil phase, discharging the water phase out of the system, compressing most of the gas phase to obtain continuous circulating gas, and circulating the circulating gas back to the step 1) to continue the reaction; a small part of gas phase is discharged as purge gas; 3) distilling out light hydrocarbon from the top of the tower by rectifying the oil phase to obtain aromatic hydrocarbon-rich oil from a tower kettle; 4) heating the light hydrocarbon and then carrying out secondary reaction to obtain a secondary reaction product; and 5) carrying out heat exchange and separation on the secondary reaction product to obtain a gas-phase product and a liquid-phase product, discharging the gas-phase product as purge gas, and circulating the liquid-phase product back to the light component removal tower for rectification and separation to obtain aromatic hydrocarbon-rich oil. The first-stage reaction realizes high per-pass conversion of CO2, and the two-stage reaction is coupled to realize high selectivity of aromatic hydrocarbon.

The present application relates to the technical field of ZSM-5 molecular sieve preparation, and provides a high-crystallinity aluminum-rich ZSM-5 molecular sieve, a preparation method and application thereof.The preparation method of the high-crystallinity aluminum-rich ZSM-5 molecular sieve provided by the present application realizes the skeleton composition control of the ZSM-5 molecular sieve by adding a second aluminum source and then performing secondary crystallization, solves the technical bottleneck that it is difficult to directly synthesize the high-crystallinity aluminum-rich ZSM-5, breaks through the lower limit of the Si / Al ratio phase region of the artificial in-situ synthesis of the molecular sieve, effectively controls the crystal parameter and improves the production efficiency, realizes the precise construction of the high-crystallinity aluminum-rich ZSM-5 molecular sieve, and thus enhances the micropore crystallinity of the molecular sieve, optimizes the acid distribution, greatly enriches the metastable surface active acid center distribution of the molecular sieve, and has good aromatic hydrocarbon conversion performance.

The invention provides a compound with an electron transmission function, an organic electroluminescent device containing the compound and application of the compound, the structure of the compound takes 9-alkyl-9-phenyl fluorenyl, phenanthryl and a triazine group as main components, the 9-alkyl-9-phenyl fluorenyl is one of core structures, fluorene is a polycyclic aromatic hydrocarbon with better planarity, and the triazine group is one of the core structures. Alkyl and phenyl are introduced to the ninth site to generate strong spatial repulsive force with a fluorene ring, a three-dimensional and non-planar propeller-shaped structure is formed, and the non-planar structure can effectively inhibit close packing of molecules in a solid state, so that concentration quenching and excimer formation caused by pi-pi packing are prevented, and the stability of the fluorescent probe is improved. And moreover, the rigid and non-planar structure can also effectively improve the thermal stability of the material, and the service life of the device is prolonged. The compound provided by the invention is used as an electron transport layer and a hole blocking layer in a light-emitting device, so that the device has low driving voltage, high luminous efficiency and long service life.

The invention relates to the technical field of C9 heavy aromatics, in particular to a method and device for producing mesitylene from C9 heavy aromatics, and the method comprises the following steps: firstly, in the presence of a catalyst, mixing the C9 heavy aromatics with hydrogen, performing dealkylation isomerization reaction and dehydrogenation separation to obtain a liquid-phase product, and then performing two-stage separation on the liquid-phase product to obtain mesitylene. And mesitylene is produced to the maximum extent. The C9 heavy aromatics are subjected to selective dealkylation and trimethylbenzene isomerization reaction, and the obtained product does not contain propylbenzene, and the content of methyl-ethylbenzene is 1t; the method has the advantages that the yield of mesitylene is more than or equal to 0.2%, the interference of methyl ethyl benzene on the separation of the mesitylene is eliminated, the loss of the mesitylene is small, the one-way yield of the mesitylene is more than or equal to 12%, the reaction process is simple, the mesitylene and unsym-trimethylbenzene products are high in purity, the unsym-trimethylbenzene can be recycled to further increase the yield of the mesitylene, the process is flexible, byproducts are few, the product value is high, and the utilization value of C9 heavy aromatic hydrocarbon resources is obviously improved.

The invention discloses an application of a novel miscellaneous [3] aromatic hydrocarbon crystal material in adsorptive separation of a pyrrolidine and tetrahydrofuran mixture and / or capture of iodine vapor, and relates to the technical field of adsorption.Firstly, the novel miscellaneous [3] aromatic hydrocarbon crystal material capable of adsorptive separation of pyrrolidine and tetrahydrofuran so as to realize iodine capture is synthesized; the application method comprises the following steps: selectively adsorbing pyrrolidine in a mixture of pyrrolidine and tetrahydrofuran by adopting the novel miscellaneous [3] aromatic hydrocarbon crystal material to obtain a pyrrolidine-miscellaneous [3] aromatic hydrocarbon crystal material, realizing separation of tetrahydrofuran and pyrrolidine, and capturing iodine vapor by adopting the pyrrolidine-miscellaneous [3] aromatic hydrocarbon crystal material. Compared with other macrocyclic aromatic hydrocarbons, the method provided by the invention not only can realize separation of tetrahydrofuran and pyrrolidine, but also has the advantages of high iodine adsorption capacity, good thermal stability and the like; meanwhile, the synthesis method has the advantages of simplicity in operation, high yield, simplicity in post-treatment, easiness in separation and purification of products and the like.

The invention discloses a method for catalyzing degradation of polyolefin mixed plastic by using molten salt. The catalyst is composed of gallium chloride or gallium chloride and other metal chlorides, has a low melting point, high fluidity and strong Lewis acidity, and can degrade polyethylene (PE), polypropylene (PP), polystyrene (PS) plastics and mixtures thereof at 70-170 DEG C under a solvent-free condition to obtain C4-C16 + alkane, olefin and aromatic hydrocarbon. The method is suitable for actual waste plastic resource recovery, and has the advantages of mild conditions, low energy consumption, product controllability and the like.

The application provides a starch-indole acid derivative and a preparation method and application thereof, and relates to the technical field of modified starches. The starch-indole acid derivative refers to esterified starch generated by esterification reaction of starch, a condensing agent and alkali and indole acid. The starch-indole acid derivative has high resistance and can resist degradation of the stomach and small intestine. After reaching the colon site, the starch-indole acid derivative can be fermented by intestinal flora to release indole acid beneficial to intestinal health. Compared with traditional drug delivery modes such as intragastric administration and intraperitoneal injection, the starch-indole acid derivative has obvious advantages and can significantly increase the content of indole acid in the colon and hepatic portal vein blood. In addition, indole acid can activate an aromatic hydrocarbon receptor to play an immunoregulatory role. The immunoregulatory role of indole acid is superimposed on the regulation role of short-chain fatty acids released by starch fermentation by intestinal flora, so that a product playing an immunoregulatory role through multiple immune system signal pathways is provided.

The present invention provides a method for manufacturing an adhesive member, comprising the steps of applying an ultraviolet-curable silicone composition containing (A) an organopolysiloxane containing an unsaturated group, (B) an organohydrogenpolysiloxane, and (C) an ultraviolet-activated hydrosilylated platinum catalyst having a cyclopentadienyl group to which a condensed aromatic hydrocarbon group is bonded as a ligand, to a first substrate layer, and including in any order: (i) bonding the first substrate layer to which the ultraviolet-curable silicone composition has been applied to a second substrate layer via a layer of ultraviolet-curable silicone composition; (ii) depressurizing the ultraviolet-curable silicone composition applied to the first substrate layer under a pressure below atmospheric pressure; and (iii) irradiating the ultraviolet-curable silicone composition applied to the first substrate layer with ultraviolet light. The invention also provides an adhesive made of a silicone composition with excellent curability, and an adhesive member with high adhesiveness and high reliability as a component.

The invention relates to the technical field of waste gas treatment, and particularly discloses waste gas treatment liquid for treating large-air-volume low-concentration waste gas through a water-based method. The waste gas treatment liquid for treating the large-air-volume low-concentration waste gas through the water-based method comprises a surfactant, a defoaming agent, a dissolution accelerant and water. Wherein the surfactant can be selected from any one or more of polyoxyethylene alkyl ether, polyoxyethylene alkyl ether and polyoxyethylene fatty acid ester; the dissolution accelerant can be selected from any one or more of ethylene glycol monobutyl ether, diethylene glycol monobutyl ether and triethylene glycol monobutyl ether; the defoaming agent is any one or more of butanol, dimethyl silicone oil, silicone and polyether modified polysiloxane. When the waste gas absorption liquid obtained in the invention is used for treating waste gas, the absorption efficiency of methanol, butanol, benzene, toluene, xylene, ethyl acetate, dichloromethane and acetone is obviously improved, and the absorption efficiency of the waste gas absorption liquid on aromatic hydrocarbon, halogenated hydrocarbon, alcohol, ketone and ester pollutants is improved.

The present application belongs to the technical field of aromatic hydrocarbon production, and relates to a method and system for producing trimethylbenzene and quarterphenyl by alkylation. Light aromatic hydrocarbons and methanol are used as raw materials, and alkylation is carried out under the catalysis of a modified molecular sieve catalyst and at a temperature of 250-600 DEG C. The material after alkylation is subjected to further alkylation under the catalysis of the modified molecular sieve catalyst and at a temperature of 250-600 DEG C. The modified molecular sieve catalyst is composed of a molecular sieve and a metal oxide supported in the molecular sieve, the molecular sieve is one or more of HY, Hbeta, IM-5, NU87, EU-1 and mordenite, and the metal in the metal oxide is one or more of Mg, Cu, La, Zn and Mo. The present application solves the technical problems of low content of trimethylbenzene and quarterphenyl components and difficult separation of trimethylbenzene and quarterphenyl in the industrial separation method by directly producing trimethylbenzene and quarterphenyl.

The invention relates to the technical field of hydrogen storage of organic aromatic hydrocarbon molecules, in particular to a derivative of a benzopyrrole compound, a preparation method and application of the derivative, a hydrogen storage method and a hydrogen release method. The chemical structural formula of the derivative is selected from one of M1, M2, M3, M4, M5R and M5S, wherein when the chemical structural formula of the derivative is M1, M2, M3, M5R or M5S, A is selected from a saturated alkyl chain with the carbon number of 1-6 or an unsaturated alkyl chain with the carbon number of 2-6; when the chemical structural formula of the derivative is M4, A is selected from a saturated alkyl chain with the carbon number of 1-6, an unsaturated alkyl chain with the carbon number of 2-6 or boron. Compared with azacyclo-organic molecular materials (carbazoles and indoles) which exist in the field of organic hydrogen storage and are massively researched, the azacyclo-aromatic organic molecular material containing the double nitrogen atoms, which can generate a bridging structure between the double nitrogen atoms and can be used for hydrogen storage, is provided for the first time; and the material is large in hydrogen storage capacity and low in melting point.

This invention relates to the field of petroleum refining and chemical engineering, and discloses a method for hydrogenating waste tire pyrolysis oil. The method includes the following steps: (1) in the presence of hydrogen, the waste tire pyrolysis oil raw material undergoes a gas-phase desulfurization reaction in a first gas-phase hydrogenation reactor to obtain a gas-phase desulfurization reaction product; (2) the gas-phase desulfurization reaction product is subjected to gas-liquid separation to obtain a gas-phase component and a liquid-phase component; (3) the liquid-phase component is pressurized and mixed with hydrogen, and then subjected to a liquid-phase dearomatics reaction in a second hydrogenation reactor to obtain a liquid-phase dearomatics reaction product; the nitrogen content in the waste tire pyrolysis oil raw material is 3000-10000 μg / g. This method uses waste tire pyrolysis oil from the middle distillate as raw material, achieving deep desulfurization while reducing the removal of nitrogen oxides and monocyclic aromatic hydrocarbon saturation. It also simplifies the overall process flow, reduces the reaction severity, and lowers energy and hydrogen consumption.

The invention discloses non-activation low-cost high-magnification asphalt-based porous carbon and a preparation method and application thereof.The preparation method comprises the steps that tar with high aromatic hydrocarbon content is subjected to a cross-linking oxidation reaction in an oxygen-containing atmosphere, and oxygen modified asphalt rich in hydroxyl and carboxyl polar functional groups is obtained; the preparation method comprises the following steps: jointly mixing oxygen modified asphalt, a soft template dispersant and a water-organic mixed solvent, and realizing uniform dispersion of the mixture in a mixed phase by utilizing the interaction of a polar functional group on the surface of the oxygen modified asphalt and the soft template dispersant; through a synergistic self-assembly reaction under a hydrothermal condition, core-shell structure micelles are formed by utilizing polarity gradient guidance of a mixed solvent, and precise regulation and control of the pore diameter are realized; after the reaction, carrying out solid-liquid separation, washing and drying to obtain a porous carbon precursor with a mesoporous framework; and performing low-temperature carbonization treatment on the porous carbon precursor in a protective atmosphere, and promoting low-temperature aromatization of asphalt molecules by using hydroxyl radicals introduced in a hydrothermal process to form the asphalt-based porous carbon with a pi-enriched conjugated structure.

The invention provides a method for catalyzing hydrogen-deuterium replacement of heterocyclic aromatic hydrocarbon by using a binary cheap metal, and belongs to the technical field of organic synthesis.The method comprises the steps that a heterocyclic aromatic hydrocarbon compound serves as a raw material, heavy water and a binary cheap metal catalyst are added under the condition that a solvent is added or not added, under inert gas protection, heating is conducted for hydrogen-deuterium replacement reaction, and after the reaction is finished, a product is obtained; and separating and purifying the product to obtain the heterocyclic aromatic hydrocarbon deuterated compound. The preparation method provided by the invention adopts cheap heavy water as a deuterium source and cheap double-element metal as a catalyst, so that the cost is low, the operability is high, the applicability is wide, and the deuteration rate is high; a cheap and efficient heterocyclic aromatic hydrocarbon deuteration technology is realized, and the limitation of the existing heterocyclic aromatic hydrocarbon deuteration technology is solved.

An organic electroluminescent device having high efficiency and high driving stability, and a material suitable for the organic electroluminescent device are provided. The material for organic electroluminescent devices comprises an indolocarbazole compound represented by a general formula (1). In the formula, the ring a is represented by a formula (1a), X is NR, S, O or CR2, and Ar1 and Ar2 are an aromatic heterocyclic group represented by a formula (1b). Y is N or CR, and at least one is N. L1 is an aromatic hydrocarbon group. The material for the organic electroluminescent devices is suitable as material for the host of the light emitting layer or the hole blocking layer of organic EL devices.

A process for production of both purified recycled aromatic dicarboxylic acid (rCA) and purified aromatic dicarboxylic acid (vCA), said process comprising:Producing a first stream comprising a recycled aromatic dicarboxylic acid by a first process, wherein the first process comprises the depolymerisation of a polymer feedstock comprising a polymer of said aromatic dicarboxylic acid in a first reaction system;Producing a second stream comprising the aromatic dicarboxylic acid by a second process wherein the second process comprises the oxidation of an aromatic hydrocarbon in a second reaction system;Purifying both the first stream and the second stream in a common purification system to thereby produce both purified recycled aromatic dicarboxylic acid (rCA) and purified aromatic dicarboxylic acid (vCA).The present invention also provides an apparatus for the production of both purified recycled aromatic dicarboxylic acid (rCA) and purified aromatic dicarboxylic acid (vCA),

The invention discloses an aromatic hydrocarbon transalkylation catalyst as well as a preparation method and application thereof. The catalyst comprises: a) alumina; b) an amorphous aid; c) an active metal component; d) a molecular sieve; wherein the amorphous auxiliary agent is loaded on the surface of the aluminum oxide. The catalyst is used for an aromatic hydrocarbon transalkylation reaction, and has the characteristics of strong naphthalene-based substance resistance and good stability.

Disclosed in the present invention is a method and system for preparing a starting material of a carbon material by means of staged hydrogenation of heavy oil. The method comprises: sequentially performing pretreatment, hydrogenation pretreatment, and vacuum distillation on heavy oil; performing selective hydrogenation treatment on a middle distillate obtained by vacuum distillation; performing hydrogenation ring-opening treatment on a heavy distillate obtained by vacuum distillation; and then performing post-treatment on a product obtained by the selective hydrogenation treatment and a product obtained by the hydrogenation ring-opening treatment, so as to obtain a starting material of a carbon material. The starting material of the carbon material prepared by the present invention has a relatively high content of tricyclic aromatic hydrocarbon and a relatively high content of tetracyclic aromatic hydrocarbon, and a relatively low content of impurities, and can be used for preparing a high-quality carbon material.

The present application provides a reversible thermochromic microcapsule pigment which is easily changed to a colored state from a colorless state by heating at a temperature in a living environment temperature range or a temperature close to a daily life temperature, and is sensitively recovered to the colorless state again. The reversible thermochromic microcapsule pigment of the present application is formed by enclosing a reversible thermochromic composition in a microcapsule, the reversible thermochromic composition comprising (A) an electron-donating colored organic compound, (B) a 4-hydroxybenzoic acid ester compound represented by the following general formula (1) as an electron-accepting compound (in the formula, R represents a linear or branched alkyl group having 12 to 22 carbon atoms), (C) a chain hydrocarbon compound or the like as a reaction medium in which reversible electron transfer reactions based on the above (A) and (B) occur, (D) a linear dibasic acid compound having 3 to 22 carbon atoms, and (E) an aromatic hydrocarbon compound or the like having a melting point of 50°C or higher.

The present disclosure is characterized by being represented by general formula G1. In general formula G1, ring C is an aromatic hydrocarbon ring or a heteroaromatic ring. A11-A15 and A21-A25 are each independently selected from the group consisting of CRA and a nitrogen atom. RA represents a hydrogen atom or a substituent of various types. When RA exists in a quantity of more than one, the plurality of RAs may be the same or different from each other. X1 and X2 are each independently selected from the group consisting of an oxygen atom, a sulfur atom, a tellurium atom, a selenium atom, and NRB. RB represents a hydrogen atom or a substituent of various types. When RB exists in a quantity of more than one, the plurality of RBs may be the same or different from each other. RAs adjacent to each other or RA and RB adjacent to each other are optionally bonded to form a ring.

The invention provides an aviation gasoline composition, aviation gasoline and a preparation method thereof, and relates to the field of aviation fuel oil. The aviation gasoline composition provided by the invention comprises petroleum-based alkylated gasoline, a component A, a component B and a component C. The component A comprises C4-C7 alkane, the component B comprises C8 isoparaffin, and the component C comprises C7-C9 aromatic hydrocarbon. The aviation gasoline composition provided by the invention can be used for obtaining 95 # lead-free aviation gasoline under the condition of not containing any substances such as metal, oxide, nitride, sulfide and the like, and the fraction is more continuous, safer and more environment-friendly in the combustion process.